CVE-2019-20431

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-01-27 · updated 2026-06-17
Weakness: CWE-787

Description

In the Lustre file system before 2.12.3, the ptlrpc module has an osd_map_remote_to_local out-of-bounds access and panic due to the lack of validation for specific fields of packets sent by a client. osd_bufs_get in the osd_ldiskfs module does not validate a certain length value.

Affected products

Lustre: before 2.12.3 — fixed in 2.12.3

How to fix

Upgrade to a fixed version: Lustre 2.12.3. Check the vendor advisory for mitigations.

References

http://lustre.org/
http://wiki.lustre.org/Lustre_2.12.3_Changelog
https://jira.whamcloud.com/browse/LU-12612
https://review.whamcloud.com/#/c/36273/
http://lustre.org/
http://wiki.lustre.org/Lustre_2.12.3_Changelog
https://jira.whamcloud.com/browse/LU-12612
https://review.whamcloud.com/#/c/36273/

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